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To build FFmpeg with libsoxr, it must first be installed. On unix-like systems, it may be available as an installable package from your OS provider; otherwise, libsoxr should be installed from source code downloaded from ​here—either a versioned tar-file, or a git 'clone'. Once downloaded (and unpacked, in the case of a tar file), it should be built and installed according to the instructions in the INSTALL file (included in the source distribution).

With libsoxr installed, ./configure --enable-libsoxr instructs the FFmpeg build system to use libsoxr.

To invoke ffmpeg with the SoX Resampler, the option -af aresample=resampler=soxr should be given; e.g.